1c-4c Pan-American Exposition Inverts, 100th Anniversary Souvenir Pane, Intaglio Frame Colors Omitted (3505 var). Mint N.H. complete pane in its original sealed post office sleeve, with three inverts, each of the three has the color frame printed entirely outside the perforations in the "souvenir" portion of the pane, only the black intaglio inverted vignettes appear within the actual stamps, the four 80c Buffalo stamps at right were printed by lithography and so are normal, fresh and pristine

A SPECTACULAR COLOR OMITTED ERROR OF THE 100TH ANNIVERSARY PAN-AMERICAN INVERTS SOUVENIR SHEET. THIS "ERROR OF AN ERROR" IS A NEW DISCOVERY AND MAY BE UNIQUE -- OFFERED TO THE MARKET FOR THE FIRST TIME.

This exceptional error is one of the most visually striking in existence. The Green, Carmine and Deep Red Brown intaglio frames are present but are printed entirely outside the perforations of the three invert stamps (originally Scott Nos. 294a, 295a and 296a). This was discovered by a collector who purchased ten of the commemorative panes when they were issued in 2001 and put them away. When he recently looked at his stock he discovered he had a single pane with the errors. This is the first report of an error on this issue, and given the fact that it has been around for 18 years, the chances of finding another would appear to be slim. The huge popularity of the 1901 Pan-American inverts makes this "error of an error" pane especially desirable.

Featured on the front page of Linn's Stamp News (May 13, 2019, article accompanies). With 2019 A.P.S. certificate. This will be listed in the 2020 Scott Specialized Catalogue

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